Lock-hinge



UNITED STATES PATENT MARTIN A. CUTTER, OF ALLEGHENY, PENNSYLVANIA.

LOCK-HING E.

SPECIFICATICN forming part of Letters Patent No. 393,217, dated November 20, 1888.

Application filed August 7, 1888. Serial No. 282.133.

(Merlot) T0 aZZ whom it may concern:

Be it known that I, MARTIN A. CUTTER, a citizen of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Combination Lock and Hinge; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon,which form a part of this specification.

This invention relates to an improvement in hinges for blinds or doors, the object being to so construct the same that it shall furnish a hinge not liable to be detached by the action of the wind or other ordinary force applied thereto, and that automatically locks the blind or door in position when either open or shut, and which when closed and locked can only be opened from the inside.

Great difficulty has been experienced in constructing these devices in such a mannerthat after they were secured to the parts the blind or door could be readily hung in place, as the pintles of the hinges at top and bottom were necessarily forced to enter simultaneously, which could not be easily accomplished by one person, as when his attention was directed to one of the hinges the other was liable to get out of place. By the use of this invention this difficulty is wholly obviated, as the pintle of the lower hinge being removable allows the upper one tobe inserted and held there until the lower hinge is in place, when by dropping the pintle the work is accomplished. This pintle is then securely held in position by a keeper upon one part of the locking device, which effectually prevents its withdrawal.

The locking-catches are so constructed as to act entirelyindependent of each other, so that when the blind or door is closed the lockingcatch which holds it in position cannot be effected by manipulating the other one, which is employed to hold the blind open.

I11 the drawings accompanying this specification, which illustrate the invention, Figure 1 is a side elevation ofa portion of a blind attached to the window-frame by the improved hinges, the blind open and locked in that po sition. Fig. 2 is a cross-section of the blind and frame on the line w x of Fig. 1, presenting a top view of the lower hinge. Fig. 3 is a similar section showing the blind closed and locked in that position. Fig. 4 is a side elevation showing the fear of the lower hinge, the parts being in the position they occupy when the hinge is open. Fig. 5 is a perspective view showing the construction of one part of the hinge, the cap, and pintle. Fig. 6 is a similar viewillustrating the construction of the other part of the lower hinge. Fig. 7 is a perspective .view of the locking devices by which the blihd is secured in either an open or closed position.

In these figures, A represents the lower and A the upper part of the upper hinge, the part A being provided with a conical pintle and the part A with a recess of corresponding shape to receive the same. By an examination of Fig. 1 it will be seen that the part A, secured to the blind and carrying the pin tle, is below the part A, that receives it, thus allowing the pintle to be entered from below, where it is in plain'sight of the person who hangs the blind, rendering it easy for him to enter the pintle and retain it in place until the lower hinge is connected. This lower hinge consists of the part B, attached to the blind, and of the part B, attached to the frame. Both parts are provided with a pintle-opening, a, which, when they are brought into proper position, receives the pintle b, which is dropped into the opening a, formed to re ceive it in the two parts of the hinge, thus completing the operation of hanging the blind. To form the lock the part B of the lower hinge is provided with projections c c on each of its outer edges and with a projection, c, in the middle. These projections form guides for the locking-plates D and D, within which guides they have a vertical movement independent of each other, and are prevented from displacement by the cap 0, secured to the pro jections outside the locking-plates. The lockiugplate D is beveled at its lower edge and is provided with a notch, e, that when the blind is open engages with the projection e upon that part of the hinge attached to the frame and effectually retains the blind in an open position, while a projection, d, from the upper part of said locking-plate extends over the upper end of the pintle b and prevents it from being removed. To close the blind. the locking-plate is lifted until the notch e is disengaged from the projection e, when the blind may be readily swung into a closed position. In order to retain it in this position, the locking-plate D is provided near its inner end with a hook projection, h, that when the blind is closed engages with the beveled notch t in the part B of the hinge, thus effectually securing the blind until the hook h is lifted from its engagement with the notch z, and as this can only be done from the inside it is apparent that the lock is an efl'ectual safeguard against parties who may attempt to open the blind from the outside, for although the lockingplate D is accessible, when the blinds are closed, from the outside, its movement does not in any way affect the locking-plate D. To raise said plate into a proper position to drop over the projection e, a lug, la, charnfered on the outer side projects from and in line with the body of said part B. This lug raises the locking-plate as the blind is turned; but when it is fully open the plate drops outside of the lug and engages with the projection 6, thus locking the blind in its opened position.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent v of the United States, the following:

1. The combination of the two parts B B of the hinge and the removable pintle b with the locking'plate D, provided with a hook projection, 01, overlapping the head of the pintle and preventing the removal of the same, as set forth. 7

2. As an improvement in hinges, the part B and the part B, the latter provided with the guide projections c and c, and the cap 0, in combination with the locking-plates D and D, arranged as shown and described, to lock the blind in either an open or closed position.

3. As an improvement in blind-hinges, the part B of the same, provided with a projecting lug, 7c, in combination with the verticallymoving locking-plate D, said lug being arranged to raise the locking-plate as the blind is being opened and allow it to drop when fully open, substantially as shown and described.

In testimony whereof I aflix my signature in presence of two witnesses.

- MARTIN A. CUTTER.

Witnesses:

S. M. CHANDLER, GEO. S. BROOK. 

